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The Valvetronic Designs Valved Exhaust System for the BMW G29 Z4 M40i is the ultimate upgrade for enthusiasts who demand both performance and versatility. Developed from our extensive R&D on B58-powered platforms—including the Supra and M340i—this system transforms the Z4’s sound and performance, unlocking the true potential of BMW’s celebrated inline-six.
Valves Open: A rich, aggressive tone with crisp throttle response, pronounced turbo spool, and motorsport-inspired overrun.
Valves Closed: A refined, stock-like sound perfect for long cruises or early-morning starts—ideal when you want performance without the attention.
Maximum Flow Design: Single 3.5" midsection transitioning into dual 3" mandrel-bent runs for optimal exhaust scavenging and reduced backpressure.
Balanced Sound Profile: Tuned for a deep, full-bodied note inspired by our acclaimed B58 Supra and M340i systems.
Precision Construction: TIG-welded T304 stainless steel for exceptional durability and corrosion resistance.
2017+ BMW G29 Z4 M40i
Fully mandrel-bent for maximum flow
Precision TIG welds for high strength
Built from T304 stainless steel
Electronic-actuated valves for rapid and reliable operation
11.1 lbs lighter than the factory exhaust
Beautiful tips to complement the Z4’s styling
100% reversible—return to stock at any time
Eurosport Performance does not have live product tracking. In stock items typically ship within 24h. All items with the "Ships in 5-7 days" mention are not in stock and must be ordered from our suppliers. The import process typically takes 5-7 days.
If you wish to have a more accurate ETA, please send us a message at info@es-performance.com and we will respond within 24-48h.
12 Months
All products sold by Eurosport Performance are warrantied against manufacturing defects according to the manufacturer's warranty policy*. Warranty does not cover abuse, misuse, damages caused from improper manipulation, normal wear and tear, improper installation, or damages resulting from racing. Warranties only apply to the original owner. If a product is found defective, the customer will receive, at the discretion of Eurosport Performance, a replacement part at no extra cost.
* Conditions may apply. Please visit our Refund Policy or contact us at info@es-performance.com
